(19)

(11)

EP 3 959 423 A1

(12)

(43) Date of publication: 02.03.2022 Bulletin 2022/09 (21) Application number: 20718222.1 (22) Date of filing: 01.04.2020

(51) International Patent Classification (IPC):  F01K 3/18(2006.01) F01K 13/02(2006.01) F22B 1/02(2006.01) (52) Cooperative Patent Classification (CPC): F01K 13/02; F01K 3/186; F22B 1/028 (86) International application number: PCT/EP2020/059219 (87) International publication number: WO 2020/216590 (29.10.2020 Gazette 2020/44)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 24.04.2019 EP 19170812 (71) Applicant: Siemens Gamesa Renewable Energy GmbH & Co. KG 20097 Hamburg (DE)	(72) Inventors: BARMEIER, Till Andreas 20259 Hamburg (DE) SEIDEL, Volker 08860 Castelldefels (ES) (74) Representative: Aspacher, Karl-Georg  Siemens Wind Power GmbH & Co. KG Postfach 22 16 34 80506 München 80506 München (DE)